WO2010049148A1 - Procede de determination de l'etat de charge d'une batterie en phase de charge ou de decharge - Google Patents
Procede de determination de l'etat de charge d'une batterie en phase de charge ou de decharge Download PDFInfo
- Publication number
- WO2010049148A1 WO2010049148A1 PCT/EP2009/007732 EP2009007732W WO2010049148A1 WO 2010049148 A1 WO2010049148 A1 WO 2010049148A1 EP 2009007732 W EP2009007732 W EP 2009007732W WO 2010049148 A1 WO2010049148 A1 WO 2010049148A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- battery
- during
- voltage
- charge
- indicator
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/3644—Constructional arrangements
- G01R31/3648—Constructional arrangements comprising digital calculation means, e.g. for performing an algorithm
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
Definitions
- the invention relates to a method for determining the state of charge of a battery during a phase of charging or discharging the battery.
- the state of charge In lead-acid batteries, the state of charge (SOC) varies, conventionally, according to the battery voltage in open circuit (zero current) in a wide range, for example more than one volt of amplitude as illustrated.
- Figure 1 - Methods for state-of-charge determination and their applications” by Sabine Piller et al published in 2001 in the "Journal of Power Sources" pages 113-120).
- the state of charge of these batteries can then be determined by a simple measurement of potential whose accuracy depends on the accuracy of the measurement of the voltage as well as the slope of the discharge curve of the battery according to its state of charge. charge.
- the state of charge can also be determined from the measurement of the non-zero current voltage.
- the accuracy depends on the accuracy of the voltage measurement, but also the current, the slope of the characteristic curve of the discharge of the battery according to its state of charge, as well as the parameters for estimating the voltage of the battery. non-zero current battery.
- These potential interpolation methods are not suitable for some current batteries, in particular lithium-ion battery cathode type biphasic material, in which the voltage difference between the charged state and the discharged state is low. Indeed, as illustrated in FIG. 2, the variations of the voltage U in volts of the battery as a function of the state of charge (SOC) are so small that for a voltage of 3.3V, it is impossible to know if the state of charge is closer to 40% than 60%.
- the state of charge of a battery can also be determined by integration of the current as a function of time.
- the accuracy of an estimate using this method depends on the accuracy of the current measurement. It is also necessary to know the initial capacity of the element, the total load capacity, the faradic efficiency.
- One of the main shortcomings of this technology is the accumulation of cycle-by-cycle errors, leading to increasingly important uncertainties (dependent on the initial capacity estimates of the element and its total capacity). This technique is therefore not applicable for long-term battery management.
- the object of the invention is to provide a method of determining the state of charge that is precise and easy to implement.
- the method comprises the following successive steps: the measurement of an electrical parameter of the battery, the open circuiting of the battery during a rest period, measuring at least first and second values of the voltage at the terminals of the battery at different times during the rest period,
- the measured electrical parameter is either the current ttrraavveerrssaanntt llaa bbaatttteerriiee aavvaanntt ssaa mmiissee eenn cciirrccuuiitt oouuvveeirt or the voltage U (t0) across the battery before it is open.
- the indicator ind1 is given by the formula indl ⁇ - ( - x (U ( ⁇ ) - U (t0) ) with U (t1 ) the first measure of tension
- the indicator is given by the formula indl ⁇ - xi with U, m la
- FIG. 1 represents a curve for determining the state of charge of a battery by means of an open circuit voltage measurement, according to the prior art.
- Figure 2 illustrates the variation of the open circuit voltage as a function of the state of charge of a lithium-ion battery.
- FIG. 3 represents the evolution of the voltage of the battery as a function of time during a discharge phase during a phase of determining the state of charge of the battery according to the invention.
- FIG. 4 illustrates a calibration curve representative of the indicator determined after the rest period as a function of the state of charge.
- FIG. 5 illustrates different curves, each associated with a different ⁇ , representative of the evolution of the values of the indicator as a function of the state of charge.
- FIG. 3 represents the evolution of the voltage of the battery as a function of time for a discharge phase with a step of determining the state of charge.
- an electrical parameter of the battery is measured before the battery is idle between times t0 and t3.
- Putting the battery to rest corresponds to an open circuit, so no current crosses the battery. This quitting causes a variation of the voltage across the battery. Typically, this variation corresponds to an increase in the voltage if the battery is in the discharge phase (FIG. 3) or to a decrease in voltage if the battery is in the charging phase (not shown).
- the rest period (t ⁇ -t3) is preferably less than or equal to 60 seconds, during which time the voltage generally reaches the plateau voltage.
- the values of the voltage at the terminals of the battery are measured at at least two different times t1 and t2.
- the instant t2 may be equal to the instant t3, that is to say that the voltage is measured just before resuming the charge or discharge phase of the battery.
- An indicator is then determined from the measurement of the electrical parameter and the values of the voltage U (t1) and U (t2) measured during the rest period t ⁇ -t3.
- the indicator can be obtained in two different ways, either by measuring the current or by measuring the voltage as an electrical parameter.
- the measured electrical parameter is the voltage U at the terminals of the battery before the rest period, that is to say at t0.
- U (t1) and U (t2) represent the voltages measured respectively at times t1 and t2
- ⁇ is a parameter dependent on the charge or discharge of the battery.
- the parameter ⁇ depends on the type of the battery. It is determined beforehand during a calibration phase by successive iterations of possible values of ⁇ , for example, between OV and the nominal voltage of the battery, to obtain a monotonic calibration curve representative of the indicator in question. function of the state of charge.
- ⁇ is determined by successive iterations during the calibration phase, it should be noted that its value is close to the average potential charge or discharge of the battery when the batteries tested have electrodes comprising the following materials LiFePO 4 / Graphite or LiFePO 4 ZLi 4 Ti 5 O 12 .
- the corresponding ⁇ is 1. 8V.
- the average potential is defined as the ratio between the battery energy (in Wh) and the capacity of the battery (in Ah) for a given charging or discharging regime.
- the measured electrical parameter is the current I passing through the battery before the rest period, that is to say at t0. After measuring the current I, the battery is placed in a rest period during which at least two values of the voltage are measured respectively at times t1 and t2. It is then possible to determine the indicator ind2 by applying the formula:
- U (t1) and U (t2) represent the voltages measured respectively at times t1 and t2
- ⁇ is a parameter dependent on the charge or the discharge of the battery, determined similarly to the variant described above to obtain a monotonic calibration curve.
- the indicator is then used to determine the state of charge (SOC) of the battery from the calibration curve (FIG. 4) obtained beforehand from at least one standard battery, this curve is representative of the variations of the indicator according to the state of charge of the battery during the charging or discharging phase.
- the calibration curve provides the relationship between the indicator and the state of charge of the battery for a predetermined ⁇ .
- the calibration curve used is that which made it possible to determine the best ⁇ .
- the curve of FIG. 4 represents the calibration curve corresponding to the variant where the intensity (ind2) traversing the battery is measured as an electrical parameter. It is necessary to perform two calibration curves, in fact, the calibration curves are different if it is a charge or discharge phase of the battery. As illustrated in FIG.
- the calibration curve represents the evolution of the indicator ind2 as a function of the state of charge of the battery during a discharge phase. This curve was obtained during of the calibration phase by successive iterations of ⁇ already described above. Tests carried out on three standard batteries of identical brand have demonstrated a low dispersion of the results making it possible to obtain a significant reproducibility of the measurement with a standard deviation of less than 5%.
- the method according to the invention is adapted to the chemistry of the battery, it allows in particular to determine the state of charge of a battery having as the pair of electrodes is an electrode in biphasic material or both.
- the method is more particularly suitable for batteries comprising electrode materials LiFePO 4 and Li 4 Ti 5 O 12 .
- the establishment of the state of charge of such batteries is realized with an important precision of which the uncertainty is less than 10%, whereas it is greater than 15% with the methods of the prior art. It is also not necessary to integrate a memory and a circuit making corrections according to the data relating to the previous charges and discharges of the battery.
- This particularly interesting process can be applied in the photovoltaic field. It can also be applied in the field of mobile devices, such as phones and computers or in the field of hybrid and electric vehicles where it is critical to use accurate load gauges.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/125,688 US8823326B2 (en) | 2008-10-30 | 2009-10-28 | Method for determining the state of charge of a battery in charging or discharging phase |
EP09744343.6A EP2344900B1 (fr) | 2008-10-30 | 2009-10-28 | Procede de determination de l'etat de charge d'une batterie en phase de charge ou de decharge |
CN2009801426085A CN102203628B (zh) | 2008-10-30 | 2009-10-28 | 确定充电或放电阶段中电池的荷电状态的方法 |
BRPI0920088A BRPI0920088A2 (pt) | 2008-10-30 | 2009-10-28 | método de determinação do estado de carga de uma bateria em fase de carga ou de descarga |
JP2011533607A JP5474993B2 (ja) | 2008-10-30 | 2009-10-28 | 充電段階または放電段階において電池の充電状態を決定する方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0806045 | 2008-10-30 | ||
FR0806045A FR2938071B1 (fr) | 2008-10-30 | 2008-10-30 | Procede de determination de l'etat de charge d'une batterie en phase de charge ou de decharge |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010049148A1 true WO2010049148A1 (fr) | 2010-05-06 |
Family
ID=40707809
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2009/007732 WO2010049148A1 (fr) | 2008-10-30 | 2009-10-28 | Procede de determination de l'etat de charge d'une batterie en phase de charge ou de decharge |
Country Status (7)
Country | Link |
---|---|
US (1) | US8823326B2 (fr) |
EP (1) | EP2344900B1 (fr) |
JP (1) | JP5474993B2 (fr) |
CN (1) | CN102203628B (fr) |
BR (1) | BRPI0920088A2 (fr) |
FR (1) | FR2938071B1 (fr) |
WO (1) | WO2010049148A1 (fr) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010062187A1 (de) * | 2010-11-30 | 2012-05-31 | Sb Limotive Company Ltd. | Verfahren zur Ermittlung der Leerlaufspannung einer Batterie, Batterie mit einem Modul zur Ermittlung der Leerlaufspannung sowie ein Kraftfahrzeug mit einer entsprechenden Batterie |
FR2989779B1 (fr) * | 2012-04-19 | 2015-02-06 | Commissariat Energie Atomique | Dispositif de determination d'une caracteristique d'une batterie et procede de fonctionnement d'un tel dispositif |
CN102788959B (zh) * | 2012-08-31 | 2014-12-03 | 长沙理工大学 | 独立光伏发电***的蓄电池充放电状态检测方法 |
CN103091640B (zh) * | 2013-01-15 | 2016-03-30 | 无锡必创传感科技有限公司 | 一种电池测试方法和装置 |
DE102013220688A1 (de) | 2013-10-14 | 2015-04-16 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Bestimmung eines ladungszustandsabhängigen Leerlaufspannungsverlaufs einer Fahrzeugbatterie |
CN104535933B (zh) * | 2014-12-26 | 2017-08-29 | 湖南金杯新能源发展有限公司 | 电池剩余电量测量方法与*** |
US9423465B1 (en) * | 2015-06-30 | 2016-08-23 | Proterra Inc. | State of charge determination |
WO2017151525A1 (fr) * | 2016-02-29 | 2017-09-08 | University Of Hawaii | Procédés et appareil de mise à jour de jauge de carburant et d'estimation d'état de santé de cellule de stockage d'énergie |
CN106707187B (zh) * | 2016-12-26 | 2020-06-23 | 宁德时代新能源科技股份有限公司 | 一种电池目标soc的确定方法及装置 |
JP6443577B2 (ja) | 2017-06-02 | 2018-12-26 | 株式会社Gsユアサ | 管理装置、蓄電モジュール、管理方法、及びコンピュータプログラム |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0391106A1 (fr) * | 1989-04-04 | 1990-10-10 | Jungheinrich Aktiengesellschaft | Procédé pour la détermination de l'état d'une batterie d'accumulateurs de plomb et dispositif mettant en oeuvre ce procédé |
DE10203810A1 (de) * | 2001-06-29 | 2003-01-16 | Bosch Gmbh Robert | Verfahren zur Ermittlung des Ladezustands und/oder der Leistungsfähigkeit eines Ladungsspeichers |
EP1589346A1 (fr) * | 2004-04-23 | 2005-10-26 | Robert Bosch Gmbh | Procédé pour la détermination de la tension de repos d'une batterie rechargeable |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2001086604A (ja) * | 1999-09-14 | 2001-03-30 | Honda Motor Co Ltd | 組電池及び残容量検出装置 |
US20080150491A1 (en) * | 2004-02-25 | 2008-06-26 | Koninklijke Philips Electronics, N.V. | Method Of Estimating The State-Of-Charge And Of The Use Time Left Of A Rechageable Battery, And Apparatus For Executing Such A Method |
CN2791738Y (zh) | 2004-04-16 | 2006-06-28 | 美国凹凸微系有限公司 | 用于电池电量监测的电路 |
US7095211B2 (en) * | 2004-04-16 | 2006-08-22 | O2Micro International Limited | Battery gas gauge |
JP4767558B2 (ja) * | 2005-03-07 | 2011-09-07 | 日立ビークルエナジー株式会社 | 電源装置用状態検知装置,電源装置及び電源装置に用いられる初期特性抽出装置 |
JP4461114B2 (ja) * | 2006-03-30 | 2010-05-12 | 株式会社東芝 | 組電池システム、組電池の充電方法及び充電式掃除機 |
KR100805116B1 (ko) * | 2006-09-08 | 2008-02-21 | 삼성에스디아이 주식회사 | 배터리 관리 시스템 및 그 구동방법 |
JP4687654B2 (ja) * | 2007-01-04 | 2011-05-25 | トヨタ自動車株式会社 | 蓄電装置の制御装置および車両 |
CN100492751C (zh) * | 2007-03-09 | 2009-05-27 | 清华大学 | 基于标准电池模型的镍氢动力电池荷电状态的估计方法 |
JP4544273B2 (ja) * | 2007-06-20 | 2010-09-15 | トヨタ自動車株式会社 | 車両用電源装置および車両用電源装置における蓄電装置の充電状態推定方法 |
CN101078750B (zh) * | 2007-06-28 | 2010-07-28 | 中国科学院电工研究所 | 车载电池监控*** |
JP5075741B2 (ja) * | 2008-06-02 | 2012-11-21 | パナソニック株式会社 | 不均衡判定回路、電源装置、及び不均衡判定方法 |
-
2008
- 2008-10-30 FR FR0806045A patent/FR2938071B1/fr active Active
-
2009
- 2009-10-28 BR BRPI0920088A patent/BRPI0920088A2/pt not_active Application Discontinuation
- 2009-10-28 WO PCT/EP2009/007732 patent/WO2010049148A1/fr active Application Filing
- 2009-10-28 JP JP2011533607A patent/JP5474993B2/ja not_active Expired - Fee Related
- 2009-10-28 EP EP09744343.6A patent/EP2344900B1/fr active Active
- 2009-10-28 CN CN2009801426085A patent/CN102203628B/zh not_active Expired - Fee Related
- 2009-10-28 US US13/125,688 patent/US8823326B2/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0391106A1 (fr) * | 1989-04-04 | 1990-10-10 | Jungheinrich Aktiengesellschaft | Procédé pour la détermination de l'état d'une batterie d'accumulateurs de plomb et dispositif mettant en oeuvre ce procédé |
DE10203810A1 (de) * | 2001-06-29 | 2003-01-16 | Bosch Gmbh Robert | Verfahren zur Ermittlung des Ladezustands und/oder der Leistungsfähigkeit eines Ladungsspeichers |
EP1589346A1 (fr) * | 2004-04-23 | 2005-10-26 | Robert Bosch Gmbh | Procédé pour la détermination de la tension de repos d'une batterie rechargeable |
Also Published As
Publication number | Publication date |
---|---|
EP2344900A1 (fr) | 2011-07-20 |
JP5474993B2 (ja) | 2014-04-16 |
BRPI0920088A2 (pt) | 2015-12-08 |
EP2344900B1 (fr) | 2018-07-18 |
FR2938071B1 (fr) | 2010-12-31 |
FR2938071A1 (fr) | 2010-05-07 |
US8823326B2 (en) | 2014-09-02 |
US20110215761A1 (en) | 2011-09-08 |
CN102203628B (zh) | 2013-11-06 |
CN102203628A (zh) | 2011-09-28 |
JP2012507018A (ja) | 2012-03-22 |
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